1. -He had bone claws for years in the comics when Magneto went crazy and tore the metal out of his body. They still cut stuff (I called bullshit!) because they were supposed to be super dense. Hey, just go with it. And I'm sure Wolverine still gets his claws. He doesn't remember anything after drowning. I bet all kinds of stuff still happened to him. Xavier wouldn't change too much with his knowledge of the future, would he?
2. Speedy Gonzales was too powerful. He would have finished the entire movie by himself. Just know he is Magneto's son and a version of him is now in the Avengers universe. He was in the cell with Magneto's other child at the end of Captain America: The Winter Soldier.
3. Time travel fixes everything.
4. Those cartoon sentinals were bitches. Even Jubilee was able to take one down. Killing a Sentinal is not fun. A single Sentinal is a huge threat. They did you a favor.
5. Did Stan Lee have a scene? I missed it, too! Also *spolier* Apocalypse. The X-Men are in serious shit if they make a movie with that guy--the "First Mutant" and his Four Horsemen.
6. Did young Xavier ever move stuff with his mind?
7. Yes. Mistique is pretty hot. I would do her.
